/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneSequenceHierarchy.h
Find the sub sequence and section information for the specified sequence ID
pointer to the sequence/section information, or nullptr if the sequence ID does not exist in this hierarchy
[FMovieSceneSubSequenceData](API\Runtime\MovieScene\Evaluation\FMovieSceneSubSequenceData) * FindSubData ( FMovieSceneSequenceIDRef SequenceID )